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/****************************************************************************
**
** Copyright (C) 1993-2009 NVIDIA Corporation.
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "SystemPrefix.h"
//==============================================================================
// Includes
//==============================================================================
#include "Qt3DSBoundingBox.h"
#include "Qt3DSMatrix.h"
//==============================================================================
// Namespace
//==============================================================================
namespace Q3DStudio {
//==============================================================================
/**
* Constructor - creates an empty BoundingBox
*/
CBoundingBox::CBoundingBox()
: m_Min(1.0f, 1.0f, 1.0f)
, m_Max(-1.0f, -1.0f, -1.0f)
{
}
//==============================================================================
/**
* Make BoundingBox invalid
*/
void CBoundingBox::SetEmpty()
{
m_Min.Set(1.0f, 1.0f, 1.0f);
m_Max.Set(-1.0f, -1.0f, -1.0f);
}
//==============================================================================
/**
* Is the BoundingBox empty?
* @return true if bounding box is empty, false otherwise
*/
BOOL CBoundingBox::IsEmpty() const
{
return (m_Min.m_X > m_Max.m_X);
}
//==============================================================================
/**
* Add a point to the BoundingBox
* @param inPoint a 3D point
*/
void CBoundingBox::Add(const RuntimeVector3 &inPoint)
{
if (IsEmpty()) {
m_Min = inPoint;
m_Max = inPoint;
} else {
m_Min.Minimize(inPoint);
m_Max.Maximize(inPoint);
}
}
//==============================================================================
/**
* Add another BoundingBox to this BoundingBox
* @param inBox a 3D BoundingBox
*/
void CBoundingBox::Add(const CBoundingBox &inBox)
{
if (!inBox.IsEmpty()) {
Add(inBox.GetMin());
Add(inBox.GetMax());
}
}
//==============================================================================
/**
* Get the bounding box's smallest position
* @return the smallest position of the bounding box
*/
const RuntimeVector3 &CBoundingBox::GetMin() const
{
return m_Min;
}
//==============================================================================
/**
* Get the bounding box's largest position
* @return the largest position of the bounding box
*/
const RuntimeVector3 &CBoundingBox::GetMax() const
{
return m_Max;
}
//==============================================================================
/**
* Apply a transform to the BoundingBox
* @param inMatrix a 4x4 trasnform matrix
*/
void CBoundingBox::Transform(const RuntimeMatrix &inMatrix)
{
// Apply transform to the 8 corners of the BoundingBox and renormalize to majox axes
CBoundingBox theTransformedBox;
RuntimeVector3 theCorners[8];
theCorners[0].Set(m_Min.m_X, m_Min.m_Y, m_Min.m_Z);
theCorners[1].Set(m_Min.m_X, m_Min.m_Y, m_Max.m_Z);
theCorners[2].Set(m_Min.m_X, m_Max.m_Y, m_Min.m_Z);
theCorners[3].Set(m_Min.m_X, m_Max.m_Y, m_Max.m_Z);
theCorners[4].Set(m_Max.m_X, m_Min.m_Y, m_Min.m_Z);
theCorners[5].Set(m_Max.m_X, m_Min.m_Y, m_Max.m_Z);
theCorners[6].Set(m_Max.m_X, m_Max.m_Y, m_Min.m_Z);
theCorners[7].Set(m_Max.m_X, m_Max.m_Y, m_Max.m_Z);
for (INT32 theIndex = 0; theIndex < 8; ++theIndex) {
theCorners[theIndex].Transform(inMatrix);
theTransformedBox.Add(theCorners[theIndex]);
}
*this = theTransformedBox;
}
} // namespace Q3DStudio
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